This is a common plan, but it doesn't work. When that moment arrives when you would want to, you no longer have the mental faculties to do it.
Before then, you'll be feeling like everything is going just fine, so why end it?
Assisted suicide or DNR's don't really work without family members to enforce them. Medical providers are incentivized to keep you alive: Both morally and financially (you can chose which counts for more depending on how cynical you are, but either way the two motives are in sync).
But re medical providers, why would they keep me alive if there's no money left? It's a pretty good bet that even AmEx would start declining charges, at some point.
They are bilking the government, not the individual. They actually prefer it that way since there isn't anyone checking on them.
Providers are happy to help you spend all your own money, and then be fully covered.
But I do agree that fraudulent exploitation of Medicaid and Medicare by the medical industry is all too common.
But I'm not the trusting sort. I have guns, and I know how to use them. And I'm planning to kill myself before I lose it completely. I have a cache of morphine and phenobarbitol. So maybe I'll die alone, but with luck, not exploited.